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Chapter 4 review
Ch4
21
Chemistry
10th Grade
11/18/2007

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Cards

Term
Electromagnetic Energy
Definition

A form of energy that exhibits wavelike behavior as it travels through space

Term
Electromagnetic Energy
Definition
All forms of electromagnetic formed together
Term
Wavelength
Definition
The distance between corresponding points on adjacent waves
Term
Frequency
Definition
The number of waves that pass a given point in a specific time
Term

Photoelectric Effect

Definition

The Emission of Electrons from a metal when light shines on the metal

Term
Quantum
Definition
The minimum quantity of energy that can be lost or gained by an atom
Term
Plank's Equation
Definition
E=hv
Term
Ground State
Definition
the lowest energy state of an atom
Term
Excited State
Definition
The state in which an atom has a higher potential energy than it has in its ground state
Term

Quantum Theory

Definition
Mathematic Description of the wave properties electrons and other very small particles
Term
Orbital
Definition
3-D region around the nucleus that indicates the probable location of an electron
Term
Quantum Numbers
Definition
the properties of atomic orbitals and the properties of electrons in orbitals
Term
Principal Quantum Number
Definition
The main energy level occupied by the electron
Term
Spin Quantum Number
Definition

Two possible values (+1/2 and -1/2) which indicate the two fundamental 2 oppositea of an electron in an orbital

Term
Electron Configuration
Definition
The arrangement of electrons in an atom. A distinct electron configuration exists for the atoms of each elements
Term
Ground-state electron
Definition

the lowest configuration energy arrangement of electrons

Term
Aufbau Principle
Definition
An electron occupies the lowest-energy orbit that can receive it
Term

Pauli Exclusion Principle

Definition
No two electrons in the same atom can the same set of 4 quantum numbers
Term
Hund's Rule
Definition
Orbitals of equal energy are each occupied by one electron before any orbital is occuped by a second electron
Term
Orbital Notation
Definition
an occupied orbital is represented by a line
Term

Inner Shell Electrons

Definition
Electrons that are not the highest occupied evergy level
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